Understanding The Human (Chest) Thorax Anatomy

The Thorax or chest is part of the human anatomy, It encompasses the thoracic cavity and the thoracic wall. The thorax contains body organs such as the heart, lungs, and thymus gland as well as muscles of other organs and various internal structures. Many diseases may affect the chest, and one of the mots common symptoms is chest pain.

Thorax Structure
The thorax is the chest area of the body connecting the neck and the abdomen, besides its internal organs and other contents. It is mostly protected and supported by the spine, rib cage, and shoulder older.

Inside the Thorax
The content of the throat includes the heart, lungs as well as the thymus gland: the major and minor pectoral muscles, trapezius muscles and neck muscle; internal structures such as the trachea, esophagus and the diaphragm and a part of the sternum. The sternum is also called the xiphoid process, as well as the content of the thoracic abdomen ( stomach pancreas, kidney/adrenal, spleen m and low esophagus). Artiers and vines are also contained – aorta superior vena cava, inferior vena cava, and the pulmonary artery) bones or the shoulder socket encompassing the upper part of the humerus, the scapula sternum, collarbone, rib cage and the floating ribs and the thoracic portion of the spine.

The only external structure is the nipples.
The area that is opened typically by open-neck shirts, the V of the chest is occasionally the location fo the light-induced skin diseases polymorphous light eruption. Alternatively, PLE – This ss is a condition caused by exposed to light, which can cause skin irritations, which can be itchy and painful, possibly being confused with hives.

The Chest
The region of the thorax between the neck and diaphragm, in the front of the body, is called the chest. The shape of the chest does not correlate with the part of the thoracic skeleton that surrounds the heart and lungs. All the thickness of the shoulders is attributed to the shoulder girdle. Moreover, contains the axillae, and the heads of the humeri. The middle line the suprasternal notch is marked above. The suprasternal notch also called the jugular notch is part of human anatomy that shows a significant visible dip connecting the neck and the collarbone. While below ( three fingers in breath) there is a transverse ridge that can be felt, which also called the sternal angle and this makes the linkage between the manubrium and the body of the sternum. Along the same level is where the second ribs join the stern and when there found the lower can often be counted. At the bottom portion of the sternum, the seventh and last true ribs join it; the uniform cartilages starts and above this portion, there is often a depression known as the bit of the stomach.

The Bones of the Thorax
The Bones are called the thoracic skeleton: is a component of the axial skeleton.
It consists of the ribs and sternum. The ribs of the thorax are counted in ascending order from 1-12. 11 & 12 are known as floating ribs because they have no anterior attachment pit in the particular cartridge attached to the sternum such as 1-7. Therefore they are called floating. However, in ribs, 8-19 considered false ribs because of their coastal cartilage articulate with the rib above costal cartilage.

Anatomical landmarks on the thorax
The anatomy of the chest can be secured through the use of anatomical landmarks such as the nipple. 8The nipple in the male is positioned in front of the fourth rib or a little below: vertically it lies a slight external to a line down from the middle of the clavicle – the clavicle or collarbone. In females, it is not so consistent. Slightly below it the lower limit of the great pectoral muscle is seen running upwards and outwards to the axilla. In females, this is obscured by the breast., which extends from the second to the sixth rib vertically and latterly extends form the edge of the sternum to the mid-axillary line. The female nipple is surrounded by half an inch or more or less of pigmented disc, the areola. The apex of the normal heart is in the fifth left intercostal space, three and a half inches from the midline.